Use a GN arg for controlling linker map file generation.

build/toolchain/gcc_toolchain.gni

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/android/config.gni")
 import("//build/config/clang/clang.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/v8_target_cpu.gni")
 import("//build/toolchain/cc_wrapper.gni")
 import("//build/toolchain/clang_static_analyzer.gni")
@@ skipping 236 matching lines @@
     } else {
       extra_cxxflags = ""
     }
 
     if (defined(invoker.extra_ldflags) && invoker.extra_ldflags != "") {
       extra_ldflags = " " + invoker.extra_ldflags
     } else {
       extra_ldflags = ""
     }
 
-    # Currently disabled on LLD because of a bug (fixed upstream).
-    # See https://crbug.com/716209.
     enable_linker_map = defined(invoker.enable_linker_map) &&
-                        invoker.enable_linker_map && !use_lld
+                        invoker.enable_linker_map && generate_linker_map
 
     # These library switches can apply to all tools below.
     lib_switch = "-l"
     lib_dir_switch = "-L"
 
     # Object files go in this directory.
     object_subdir = "{{target_out_dir}}/{{label_name}}"
 
     tool("cc") {
       depfile = "{{output}}.d"
@@ skipping 315 matching lines @@
                            ])
 
     toolchain_args = {
       if (defined(invoker.toolchain_args)) {
         forward_variables_from(invoker.toolchain_args, "*")
       }
       is_clang = true
     }
   }
 }